like i said in above comments its not a clunk its more of a "swoosh thud" lol if that makes any sense. what ever im not worried it must be normal because the car runs perfect and only has 2,800 miles on it. its def from the new intake and taking out the range v8. i put on the range v8 at 700 miles so i never really experienced much of the AFM and its weird bullshit that it causes. im sure once its tuned i will never hear it again because the AFM will then forever be turned off.

Read my comment above, I believe it is normal operation of the CAI, I get the same noise when I turn my car off and its perfectly normal.